func TestAPIErrCodeDefinition(t *testing.T) {
	for errAPI := ErrNone + 1; errAPI < apiErrCodeEnd; errAPI++ {
		errCode, ok := errorCodes[errAPI]
		if !ok {
			t.Fatal(errAPI, "error code is not defined in the API error code table")
		}
		if errCode.Code == "" {
			t.Fatal(errAPI, "error code has an empty XML code")
		}
		if errCode.HTTPStatusCode == 0 {
			t.Fatal(errAPI, "error code has a zero HTTP status code")
		}
	}

		Writer:       writer,
		Config:       config,
		infoStr:      infoStr,
		warnStr:      warnStr,
		errStr:       errStr,
		traceStr:     traceStr,
		traceWarnStr: traceWarnStr,
		traceErrStr:  traceErrStr,
	}
}

type logger struct {
	Writer
	Config
	infoStr, warnStr, errStr            string
	traceStr, traceErrStr, traceWarnStr string
}

// LogMode log mode

			for i := range len(throughputHighestResults) {
				errStr := ""
				if throughputHighestResults[i].Error != "" {
					errStr = throughputHighestResults[i].Error
				}

				// if the default concurrency yields zero results, throw an error.
				if throughputHighestResults[i].Downloads == 0 && opts.concurrencyStart == concurrency {

	delta := globalNetPerfRX.firstToDisconnect.Sub(globalNetPerfRX.lastToConnect)
	if delta < 0 {
		rx = 0
		errStr = "network disconnection issues detected"
	}

	globalNetPerfRX.Reset()
	return madmin.NetperfNodeResult{Endpoint: "", TX: r.n / uint64(duration.Seconds()), RX: uint64(rx / delta.Seconds()), Error: errStr}
}

func siteNetperf(ctx context.Context, duration time.Duration) madmin.SiteNetPerfNodeResult {

			if err != nil {
				t.Fatal(err)
			}

			errStr := ""
			err = checkPostPolicy(tt.fv.Header, postPolicyForm)
			if err != nil {
				errStr = err.Error()
			}
			if errStr != tt.wantErr {
				t.Errorf("test: '%s', want error: '%s', got error: '%s'", tt.name, tt.wantErr, errStr)
			}
		})
	}

		},
	}
	for i, testCase := range testCases {
		if testCase.errStr != "" {
			got := releaseTimeToReleaseTag(testCase.t)
			if got != testCase.tag && testCase.errStr == "" {
				t.Errorf("Test %d: Expected %v but got %v", i+1, testCase.tag, got)
			}
		}
		tagTime, err := releaseTagToReleaseTime(testCase.tag)
		if err != nil && err.Error() != testCase.errStr {

	var errStr string
	if err != nil {
		errStr = err.Error()
	}
	return madmin.TraceInfo{
		TraceType: madmin.TraceFTP,
		Time:      startTime,
		NodeName:  globalLocalNodeName,
		FuncName:  s.Method,
		Duration:  time.Since(startTime),
		Path:      s.Filepath,
		Error:     errStr,
		Bytes:     sz,
		Custom: map[string]string{
			"user":   user,

	var errStr string
	if err != nil {
		errStr = err.Error()
	}
	return madmin.TraceInfo{
		TraceType: madmin.TraceOS,
		Time:      startTime,
		NodeName:  globalLocalNodeName,
		FuncName:  "os." + s.String(),
		Duration:  duration,
		Path:      path,
		Error:     errStr,
	}
}

func auditLogRebalance(ctx context.Context, apiName, bucket, object, versionID string, err error) {
	errStr := ""
	if err != nil {
		errStr = err.Error()
	}
	auditLogInternal(ctx, AuditLogOptions{
		Event:     "rebalance",
		APIName:   apiName,
		Bucket:    bucket,
		Object:    object,
		VersionID: versionID,
		Error:     errStr,
	})
}

	var errStr string
	if err != nil {
		errStr = err.Error()
	}
	return madmin.TraceInfo{
		TraceType: madmin.TraceFTP,
		Time:      startTime,
		NodeName:  globalLocalNodeName,
		FuncName:  s.Cmd,
		Duration:  time.Since(startTime),
		Path:      objPath,
		Error:     errStr,
		Bytes:     sz,
		Custom: map[string]string{